14MM X 1.50 with 21MM socket head. Available with or without external threads for plastic lug nut covers
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I recommend purchasing or checking out from your local library a Chilton book for your make/model. These are the most complete how-to car repair books I have found. They are a little less than $20.00 at a parts store if you wanted to keep one around just in case. They give photos, diagrams, and instructions on how to do every job to care for your car. I just changed my own, one little tip, make sure the gasket is on correctly and doesn't misalign while your trying to stab the bolts through. I took a pocket knife and made the holes slightly larger on the gaskets b/c the bolts kept moving them around. Good luck.
This would be covered under the bumper to bumper warranty which expired at the end of 12 months or 12,000 miles. Powertrain is the engine, transmission, & differential. What powers the vehicle, nothing more. I believe there may be a recall on them. I have refered a couple customers to the dealer because they were within the 36,000 mile/ 3 year manufacturer's warranty prior to the recall and they had them fixed.
ON my 1967 Buick Electra 225 the driver door jammed and both the inside handle and outside handle felt like there was nothing connected. One day I peered into the window and could see a little metal tab on the left side that I could see was connected to the door mechanism. I just slid a flat head screwdriver down the window crack and pulled the tab up, back into the original position. It worked perfect. However, I've found that what jammed my door was that if the handles are pulled while locked it jams. Hope that helps.